Easydeal 20Pcs Mini Drill Bits Micro Twist Drill Bit Set 0.3mm-1.6mm Craft with Case 20 pcs twist drill bit set,repair tools with black cover case.20Pcs Micro HSS Mini Twist Drills Twist Drill Great for precision crafts, jewellery, watch repair, model making, hobby work, Electronics etc. Great for all sorts of jewelry & watch making as well as being ideal for repair work to, Specially designed box keeps bits securely in place and dispenses on drill bit at a time Material: HSS 4241 Usage: for Carpentry, Family Standing, Electronic Repairs, Drill Wood Products, Plastics, Circuit Boards, etc. Not to be used for metal drilling. Size: 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm 0.85mm, 0.9mm, 0.95mm, 1.0mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm Included : 1 X 20Pcs Mini drill bit Micro Twist Drill Bit Set